(function(window, doc) {
    var m = Math,
        dummyStyle = doc.createElement("div").style,
        vendor = function() {
            var vendors = "t,webkitT,MozT,msT,OT".split(","),
                t, i = 0,
                l = vendors.length;
            for (; i < l; i++) {
                t = vendors[i] + "ransform";
                if (t in dummyStyle) {
                    return vendors[i].substr(0, vendors[i].length - 1);
                }
            }
            return false;
        }(),
        cssVendor = vendor ? "-" + vendor.toLowerCase() + "-" : "",
        transform = prefixStyle("transform"),
        transitionProperty = prefixStyle("transitionProperty"),
        transitionDuration = prefixStyle("transitionDuration"),
        transformOrigin = prefixStyle("transformOrigin"),
        transitionTimingFunction = prefixStyle("transitionTimingFunction"),
        transitionDelay = prefixStyle("transitionDelay"),
        isAndroid = /android/gi.test(navigator.appVersion),
        isIDevice = /iphone|ipad/gi.test(navigator.appVersion),
        isTouchPad =
        /hp-tablet/gi.test(navigator.appVersion),
        has3d = prefixStyle("perspective") in dummyStyle,
        hasTouch = "ontouchstart" in window && !isTouchPad,
        hasTransform = vendor !== false,
        hasTransitionEnd = prefixStyle("transition") in dummyStyle,
        RESIZE_EV = "onorientationchange" in window ? "orientationchange" : "resize",
        START_EV = hasTouch ? "touchstart" : "mousedown",
        MOVE_EV = hasTouch ? "touchmove" : "mousemove",
        END_EV = hasTouch ? "touchend" : "mouseup",
        CANCEL_EV = hasTouch ? "touchcancel" : "mouseup",
        TRNEND_EV = function() {
            if (vendor === false) {
                return false;
            }
            var transitionEnd = {
                "": "transitionend",
                "webkit": "webkitTransitionEnd",
                "Moz": "transitionend",
                "O": "otransitionend",
                "ms": "MSTransitionEnd"
            };
            return transitionEnd[vendor];
        }(),
        nextFrame = function() {
            return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) {
                return setTimeout(callback, 1);
            };
        }(),
        cancelFrame = function() {
            return window.cancelRequestAnimationFrame || window.cancelAnimationFrame || window.webkitCancelAnimationFrame || window.webkitCancelRequestAnimationFrame || window.mozCancelRequestAnimationFrame || window.oCancelRequestAnimationFrame || window.msCancelRequestAnimationFrame || clearTimeout;
        }(),
        translateZ = has3d ? " translateZ(0)" : "",
        iScroll = function(el, options) {
            var that = this,
                i;
            that.wrapper = typeof el == "object" ? el : doc.getElementById(el);
            that.wrapper.style.overflow = "hidden";
            that.scroller = that.wrapper.children[0];
            that.options = {
                hScroll: true,
                vScroll: true,
                x: 0,
                y: 0,
                bounce: true,
                bounceLock: false,
                momentum: true,
                lockDirection: true,
                useTransform: true,
                useTransition: false,
                topOffset: 0,
                checkDOMChanges: false,
                handleClick: true,
                hScrollbar: true,
                vScrollbar: true,
                fixedScrollbar: isAndroid,
                hideScrollbar: isIDevice,
                fadeScrollbar: isIDevice && has3d,
                scrollbarClass: "",
                zoom: false,
                zoomMin: 1,
                zoomMax: 4,
                doubleTapZoom: 2,
                wheelAction: "scroll",
                snap: false,
                snapThreshold: 1,
                onRefresh: null,
                onBeforeScrollStart: function(e) {
                    e.preventDefault();
                },
                onScrollStart: null,
                onBeforeScrollMove: null,
                onScrollMove: null,
                onBeforeScrollEnd: null,
                onScrollEnd: null,
                onTouchEnd: null,
                onDestroy: null,
                onZoomStart: null,
                onZoom: null,
                onZoomEnd: null
            };
            for (i in options) {
                that.options[i] = options[i];
            }
            that.x = that.options.x;
            that.y = that.options.y;
            that.options.useTransform = hasTransform && that.options.useTransform;
            that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
            that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
            that.options.zoom = that.options.useTransform && that.options.zoom;
            that.options.useTransition = hasTransitionEnd && that.options.useTransition;
            if (that.options.zoom && isAndroid) {
                translateZ = "";
            }
            that.scroller.style[transitionProperty] = that.options.useTransform ? cssVendor + "transform" : "top left";
            that.scroller.style[transitionDuration] = "0";
            that.scroller.style[transformOrigin] = "0 0";
            if (that.options.useTransition) {
                that.scroller.style[transitionTimingFunction] = "cubic-bezier(0.33,0.66,0.66,1)";
            }
            if (that.options.useTransform) {
                that.scroller.style[transform] = "translate(" + that.x + "px," + that.y + "px)" + translateZ;
            } else {
                that.scroller.style.cssText += ";position:absolute;top:" + that.y + "px;left:" + that.x + "px";
            }
            if (that.options.useTransition) {
                that.options.fixedScrollbar = true;
            }
            that.refresh();
            that._bind(RESIZE_EV, window);
            that._bind(START_EV);
            if (!hasTouch) {
                if (that.options.wheelAction != "none") {
                    that._bind("DOMMouseScroll");
                    that._bind("mousewheel");
                }
            }
            if (that.options.checkDOMChanges) {
                that.checkDOMTime = setInterval(function() {
                    that._checkDOMChanges();
                }, 500);
            }
        };
    iScroll.prototype = {
        enabled: true,
        x: 0,
        y: 0,
        steps: [],
        scale: 1,
        currPageX: 0,
        currPageY: 0,
        pagesX: [],
        pagesY: [],
        aniTime: null,
        wheelZoomCount: 0,
        handleEvent: function(e) {
            var that = this;
            switch (e.type) {
                case START_EV:
                    if (!hasTouch && e.button !== 0) {
                        return;
                    }
                    that._start(e);
                    break;
                case MOVE_EV:
                    that._move(e);
                    break;
                case END_EV:
                    ;
                case CANCEL_EV:
                    that._end(e);
                    break;
                case RESIZE_EV:
                    that._resize();
                    break;
                case "DOMMouseScroll":
                    ;
                case "mousewheel":
                    that._wheel(e);
                    break;
                case TRNEND_EV:
                    that._transitionEnd(e);
                    break;
            }
        },
        _checkDOMChanges: function() {
            if (this.moved || this.zoomed || this.animating || this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this.scale) {
                return;
            }
            this.refresh();
        },
        _scrollbar: function(dir) {
            var that = this,
                bar;
            if (!that[dir + "Scrollbar"]) {
                if (that[dir + "ScrollbarWrapper"]) {
                    if (hasTransform) {
                        that[dir + "ScrollbarIndicator"].style[transform] = "";
                    }
                    that[dir + "ScrollbarWrapper"].parentNode.removeChild(that[dir + "ScrollbarWrapper"]);
                    that[dir + "ScrollbarWrapper"] = null;
                    that[dir + "ScrollbarIndicator"] = null;
                }
                return;
            }
            if (!that[dir + "ScrollbarWrapper"]) {
                bar = doc.createElement("div");
                if (that.options.scrollbarClass) {
                    bar.className = that.options.scrollbarClass + dir.toUpperCase();
                } else {
                    bar.style.cssText = "position:absolute;z-index:100;" + (dir == "h" ? "height:7px;bottom:1px;left:2px;right:" + (that.vScrollbar ? "7" : "2") + "px" : "width:7px;bottom:" + (that.hScrollbar ? "7" : "2") + "px;top:2px;right:1px");
                }
                bar.style.cssText += ";pointer-events:none;" + cssVendor + "transition-property:opacity;" + cssVendor + "transition-duration:" + (that.options.fadeScrollbar ? "350ms" : "0") + ";overflow:hidden;opacity:" + (that.options.hideScrollbar ? "0" : "1");
                that.wrapper.appendChild(bar);
                that[dir + "ScrollbarWrapper"] = bar;
                bar = doc.createElement("div");
                if (!that.options.scrollbarClass) {
                    bar.style.cssText = "position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);" + cssVendor + "background-clip:padding-box;" + cssVendor + "box-sizing:border-box;" + (dir == "h" ? "height:100%" : "width:100%") + ";" + cssVendor + "border-radius:3px;border-radius:3px";
                }
                bar.style.cssText += ";pointer-events:none;" + cssVendor + "transition-property:" + cssVendor + "transform;" + cssVendor + "transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);" + cssVendor + "transition-duration:0;" + cssVendor + "transform: translate(0,0)" + translateZ;
                if (that.options.useTransition) {
                    bar.style.cssText += ";" + cssVendor + "transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)";
                }
                that[dir + "ScrollbarWrapper"].appendChild(bar);
                that[dir + "ScrollbarIndicator"] = bar;
            }
            if (dir == "h") {
                that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
                that.hScrollbarIndicatorSize = m.max(m.round(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);
                that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + "px";
                that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;
                that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;
            } else {
                that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
                that.vScrollbarIndicatorSize = m.max(m.round(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);
                that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + "px";
                that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;
                that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;
            }
            that._scrollbarPos(dir, true);
        },
        _resize: function() {
            var that = this;
            setTimeout(function() {
                that.refresh();
            }, isAndroid ? 200 : 0);
        },
        _pos: function(x, y) {
            if (this.zoomed) {
                return;
            }
            x = this.hScroll ? x : 0;
            y = this.vScroll ? y : 0;
            if (this.options.useTransform) {
                this.scroller.style[transform] = "translate(" + x + "px," + y + "px) scale(" + this.scale + ")" + translateZ;
            } else {
                x = m.round(x);
                y = m.round(y);
                this.scroller.style.left = x + "px";
                this.scroller.style.top = y + "px";
            }
            this.x = x;
            this.y = y;
            this._scrollbarPos("h");
            this._scrollbarPos("v");
        },
        _scrollbarPos: function(dir, hidden) {
            var that = this,
                pos = dir == "h" ? that.x : that.y,
                size;
            if (!that[dir + "Scrollbar"]) {
                return;
            }
            pos = that[dir + "ScrollbarProp"] * pos;
            if (pos < 0) {
                if (!that.options.fixedScrollbar) {
                    size = that[dir + "ScrollbarIndicatorSize"] + m.round(pos * 3);
                    if (size < 8) {
                        size = 8;
                    }
                    that[dir + "ScrollbarIndicator"].style[dir == "h" ? "width" : "height"] = size + "px";
                }
                pos = 0;
            } else {
                if (pos > that[dir + "ScrollbarMaxScroll"]) {
                    if (!that.options.fixedScrollbar) {
                        size = that[dir + "ScrollbarIndicatorSize"] - m.round((pos - that[dir + "ScrollbarMaxScroll"]) * 3);
                        if (size < 8) {
                            size = 8;
                        }
                        that[dir + "ScrollbarIndicator"].style[dir == "h" ? "width" : "height"] = size + "px";
                        pos = that[dir + "ScrollbarMaxScroll"] + (that[dir + "ScrollbarIndicatorSize"] - size);
                    } else {
                        pos = that[dir + "ScrollbarMaxScroll"];
                    }
                }
            }
            that[dir + "ScrollbarWrapper"].style[transitionDelay] = "0";
            that[dir + "ScrollbarWrapper"].style.opacity = hidden && that.options.hideScrollbar ? "0" : "1";
            that[dir + "ScrollbarIndicator"].style[transform] = "translate(" + (dir == "h" ? pos + "px,0)" : "0," + pos + "px)") + translateZ;
        },
        _start: function(e) {
            var that = this,
                point = hasTouch ? e.touches[0] : e,
                matrix, x, y, c1, c2;
            if (!that.enabled) {
                return;
            }
            if (that.options.onBeforeScrollStart) {
                that.options.onBeforeScrollStart.call(that, e);
            }
            if (that.options.useTransition || that.options.zoom) {
                that._transitionTime(0);
            }
            that.moved = false;
            that.animating = false;
            that.zoomed = false;
            that.distX = 0;
            that.distY = 0;
            that.absDistX = 0;
            that.absDistY = 0;
            that.dirX = 0;
            that.dirY = 0;
            if (that.options.zoom && hasTouch && e.touches.length > 1) {
                c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
                c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
                that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);
                that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;
                that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;
                if (that.options.onZoomStart) {
                    that.options.onZoomStart.call(that, e);
                }
            }
            if (that.options.momentum) {
                if (that.options.useTransform) {
                    matrix = getComputedStyle(that.scroller, null)[transform].replace(/[^0-9\-.,]/g, "").split(",");
                    x = +(matrix[12] || matrix[4]);
                    y = +(matrix[13] || matrix[5]);
                } else {
                    x = +getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, "");
                    y = +getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, "");
                }
                if (x != that.x || y != that.y) {
                    if (that.options.useTransition) {
                        that._unbind(TRNEND_EV);
                    } else {
                        cancelFrame(that.aniTime);
                    }
                    that.steps = [];
                    that._pos(x, y);
                    if (that.options.onScrollEnd) {
                        that.options.onScrollEnd.call(that);
                    }
                }
            }
            that.absStartX = that.x;
            that.absStartY = that.y;
            that.startX = that.x;
            that.startY = that.y;
            that.pointX = point.pageX;
            that.pointY = point.pageY;
            that.startTime = e.timeStamp || Date.now();
            if (that.options.onScrollStart) {
                that.options.onScrollStart.call(that, e);
            }
            that._bind(MOVE_EV, window);
            that._bind(END_EV, window);
            that._bind(CANCEL_EV, window);
        },
        _move: function(e) {
            var that = this,
                point = hasTouch ? e.touches[0] : e,
                deltaX = point.pageX - that.pointX,
                deltaY = point.pageY - that.pointY,
                newX = that.x + deltaX,
                newY = that.y + deltaY,
                c1, c2, scale, timestamp = e.timeStamp || Date.now();
            if (that.options.onBeforeScrollMove) {
                that.options.onBeforeScrollMove.call(that, e);
            }
            if (that.options.zoom && hasTouch && e.touches.length > 1) {
                c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
                c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
                that.touchesDist = m.sqrt(c1 * c1 + c2 * c2);
                that.zoomed = true;
                scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;
                if (scale < that.options.zoomMin) {
                    scale = .5 * that.options.zoomMin * Math.pow(2, scale / that.options.zoomMin);
                } else {
                    if (scale > that.options.zoomMax) {
                        scale = 2 * that.options.zoomMax * Math.pow(.5, that.options.zoomMax / scale);
                    }
                }
                that.lastScale = scale / this.scale;
                newX = this.originX - this.originX * that.lastScale + this.x;
                newY = this.originY - this.originY * that.lastScale + this.y;
                this.scroller.style[transform] = "translate(" + newX + "px," + newY + "px) scale(" + scale + ")" + translateZ;
                if (that.options.onZoom) {
                    that.options.onZoom.call(that, e);
                }
                return;
            }
            that.pointX = point.pageX;
            that.pointY = point.pageY;
            if (newX > 0 || newX < that.maxScrollX) {
                newX = that.options.bounce ? that.x + deltaX / 2 : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
            }
            if (newY > that.minScrollY || newY < that.maxScrollY) {
                newY = that.options.bounce ? that.y + deltaY / 2 : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY : that.maxScrollY;
            }
            that.distX += deltaX;
            that.distY += deltaY;
            that.absDistX = m.abs(that.distX);
            that.absDistY = m.abs(that.distY);
            if (that.absDistX < 6 && that.absDistY < 6) {
                return;
            }
            if (that.options.lockDirection) {
                if (that.absDistX > that.absDistY + 5) {
                    newY = that.y;
                    deltaY = 0;
                } else {
                    if (that.absDistY > that.absDistX + 5) {
                        newX = that.x;
                        deltaX = 0;
                    }
                }
            }
            that.moved = true;
            that._pos(newX, newY);
            that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
            that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
            if (timestamp - that.startTime > 300) {
                that.startTime = timestamp;
                that.startX = that.x;
                that.startY = that.y;
            }
            if (that.options.onScrollMove) {
                that.options.onScrollMove.call(that, e);
            }
        },
        _end: function(e) {
            if (hasTouch && e.touches.length !== 0) {
                return;
            }
            var that = this,
                point = hasTouch ? e.changedTouches[0] : e,
                target, ev, momentumX = {
                    dist: 0,
                    time: 0
                },
                momentumY = {
                    dist: 0,
                    time: 0
                },
                duration = (e.timeStamp || Date.now()) - that.startTime,
                newPosX = that.x,
                newPosY = that.y,
                distX, distY, newDuration, snap, scale;
            that._unbind(MOVE_EV, window);
            that._unbind(END_EV, window);
            that._unbind(CANCEL_EV, window);
            if (that.options.onBeforeScrollEnd) {
                that.options.onBeforeScrollEnd.call(that, e);
            }
            if (that.zoomed) {
                scale = that.scale * that.lastScale;
                scale = Math.max(that.options.zoomMin, scale);
                scale = Math.min(that.options.zoomMax, scale);
                that.lastScale = scale / that.scale;
                that.scale = scale;
                that.x = that.originX - that.originX * that.lastScale + that.x;
                that.y = that.originY - that.originY * that.lastScale + that.y;
                that.scroller.style[transitionDuration] = "200ms";
                that.scroller.style[transform] = "translate(" + that.x + "px," + that.y + "px) scale(" + that.scale + ")" + translateZ;
                that.zoomed = false;
                that.refresh();
                if (that.options.onZoomEnd) {
                    that.options.onZoomEnd.call(that, e);
                }
                return;
            }
            if (!that.moved) {
                if (hasTouch) {
                    if (that.doubleTapTimer && that.options.zoom) {
                        clearTimeout(that.doubleTapTimer);
                        that.doubleTapTimer = null;
                        if (that.options.onZoomStart) {
                            that.options.onZoomStart.call(that, e);
                        }
                        that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);
                        if (that.options.onZoomEnd) {
                            setTimeout(function() {
                                that.options.onZoomEnd.call(that, e);
                            }, 200);
                        }
                    } else {
                        if (this.options.handleClick) {
                            that.doubleTapTimer = setTimeout(function() {
                                that.doubleTapTimer = null;
                                target = point.target;
                                while (target.nodeType != 1) {
                                    target = target.parentNode;
                                }
                                if (target.tagName != "SELECT" && target.tagName != "INPUT" && target.tagName != "TEXTAREA") {
                                    ev = doc.createEvent("MouseEvents");
                                    ev.initMouseEvent("click", true, true, e.view, 1, point.screenX, point.screenY, point.clientX, point.clientY, e.ctrlKey, e.altKey, e.shiftKey, e.metaKey, 0, null);
                                    ev._fake = true;
                                    target.dispatchEvent(ev);
                                }
                            }, that.options.zoom ? 250 : 0);
                        }
                    }
                }
                that._resetPos(400);
                if (that.options.onTouchEnd) {
                    that.options.onTouchEnd.call(that, e);
                }
                return;
            }
            if (duration < 300 && that.options.momentum) {
                momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
                momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y - that.minScrollY : 0, that.options.bounce ? that.wrapperH : 0) : momentumY;
                newPosX = that.x + momentumX.dist;
                newPosY = that.y + momentumY.dist;
                if (that.x > 0 && newPosX > 0 || that.x < that.maxScrollX && newPosX < that.maxScrollX) {
                    momentumX = {
                        dist: 0,
                        time: 0
                    };
                }
                if (that.y > that.minScrollY && newPosY > that.minScrollY || that.y < that.maxScrollY && newPosY < that.maxScrollY) {
                    momentumY = {
                        dist: 0,
                        time: 0
                    };
                }
            }
            if (momentumX.dist || momentumY.dist) {
                newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);
                if (that.options.snap) {
                    distX = newPosX - that.absStartX;
                    distY = newPosY - that.absStartY;
                    if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) {
                        that.scrollTo(that.absStartX, that.absStartY, 200);
                    } else {
                        snap = that._snap(newPosX, newPosY);
                        newPosX = snap.x;
                        newPosY = snap.y;
                        newDuration = m.max(snap.time, newDuration);
                    }
                }
                that.scrollTo(m.round(newPosX), m.round(newPosY), newDuration);
                if (that.options.onTouchEnd) {
                    that.options.onTouchEnd.call(that, e);
                }
                return;
            }
            if (that.options.snap) {
                distX = newPosX - that.absStartX;
                distY = newPosY - that.absStartY;
                if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) {
                    that.scrollTo(that.absStartX, that.absStartY, 200);
                } else {
                    snap = that._snap(that.x, that.y);
                    if (snap.x != that.x || snap.y != that.y) {
                        that.scrollTo(snap.x, snap.y, snap.time);
                    }
                }
                if (that.options.onTouchEnd) {
                    that.options.onTouchEnd.call(that, e);
                }
                return;
            }
            that._resetPos(200);
            if (that.options.onTouchEnd) {
                that.options.onTouchEnd.call(that, e);
            }
        },
        _resetPos: function(time) {
            var that = this,
                resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
                resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;
            if (resetX == that.x && resetY == that.y) {
                if (that.moved) {
                    that.moved = false;
                    if (that.options.onScrollEnd) {
                        that.options.onScrollEnd.call(that);
                    }
                }
                if (that.hScrollbar && that.options.hideScrollbar) {
                    if (vendor == "webkit") {
                        that.hScrollbarWrapper.style[transitionDelay] = "300ms";
                    }
                    that.hScrollbarWrapper.style.opacity = "0";
                }
                if (that.vScrollbar && that.options.hideScrollbar) {
                    if (vendor == "webkit") {
                        that.vScrollbarWrapper.style[transitionDelay] = "300ms";
                    }
                    that.vScrollbarWrapper.style.opacity = "0";
                }
                return;
            }
            that.scrollTo(resetX, resetY, time || 0);
        },
        _wheel: function(e) {
            var that = this,
                wheelDeltaX, wheelDeltaY, deltaX, deltaY, deltaScale;
            if ("wheelDeltaX" in e) {
                wheelDeltaX = e.wheelDeltaX / 12;
                wheelDeltaY = e.wheelDeltaY / 12;
            } else {
                if ("wheelDelta" in e) {
                    wheelDeltaX = wheelDeltaY = e.wheelDelta / 12;
                } else {
                    if ("detail" in e) {
                        wheelDeltaX = wheelDeltaY = -e.detail * 3;
                    } else {
                        return;
                    }
                }
            }
            if (that.options.wheelAction == "zoom") {
                deltaScale = that.scale * Math.pow(2, 1 / 3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0));
                if (deltaScale < that.options.zoomMin) {
                    deltaScale = that.options.zoomMin;
                }
                if (deltaScale > that.options.zoomMax) {
                    deltaScale = that.options.zoomMax;
                }
                if (deltaScale != that.scale) {
                    if (!that.wheelZoomCount && that.options.onZoomStart) {
                        that.options.onZoomStart.call(that, e);
                    }
                    that.wheelZoomCount++;
                    that.zoom(e.pageX, e.pageY, deltaScale, 400);
                    setTimeout(function() {
                        that.wheelZoomCount--;
                        if (!that.wheelZoomCount && that.options.onZoomEnd) {
                            that.options.onZoomEnd.call(that, e);
                        }
                    }, 400);
                }
                return;
            }
            deltaX = that.x + wheelDeltaX;
            deltaY = that.y + wheelDeltaY;
            if (deltaX > 0) {
                deltaX = 0;
            } else {
                if (deltaX < that.maxScrollX) {
                    deltaX = that.maxScrollX;
                }
            }
            if (deltaY > that.minScrollY) {
                deltaY = that.minScrollY;
            } else {
                if (deltaY < that.maxScrollY) {
                    deltaY = that.maxScrollY;
                }
            }
            if (that.maxScrollY < 0) {
                that.scrollTo(deltaX, deltaY, 0);
            }
        },
        _transitionEnd: function(e) {
            var that = this;
            if (e.target != that.scroller) {
                return;
            }
            that._unbind(TRNEND_EV);
            that._startAni();
        },
        _startAni: function() {
            var that = this,
                startX = that.x,
                startY = that.y,
                startTime = Date.now(),
                step, easeOut, animate;
            if (that.animating) {
                return;
            }
            if (!that.steps.length) {
                that._resetPos(400);
                return;
            }
            step = that.steps.shift();
            if (step.x == startX && step.y == startY) {
                step.time = 0;
            }
            that.animating = true;
            that.moved = true;
            if (that.options.useTransition) {
                that._transitionTime(step.time);
                that._pos(step.x, step.y);
                that.animating = false;
                if (step.time) {
                    that._bind(TRNEND_EV);
                } else {
                    that._resetPos(0);
                }
                return;
            }
            animate = function() {
                var now = Date.now(),
                    newX, newY;
                if (now >= startTime + step.time) {
                    that._pos(step.x, step.y);
                    that.animating = false;
                    if (that.options.onAnimationEnd) {
                        that.options.onAnimationEnd.call(that);
                    }
                    that._startAni();
                    return;
                }
                now = (now - startTime) / step.time - 1;
                easeOut = m.sqrt(1 - now * now);
                newX = (step.x - startX) * easeOut + startX;
                newY = (step.y - startY) * easeOut + startY;
                that._pos(newX, newY);
                if (that.animating) {
                    that.aniTime = nextFrame(animate);
                }
            };
            animate();
        },
        _transitionTime: function(time) {
            time += "ms";
            this.scroller.style[transitionDuration] = time;
            if (this.hScrollbar) {
                this.hScrollbarIndicator.style[transitionDuration] = time;
            }
            if (this.vScrollbar) {
                this.vScrollbarIndicator.style[transitionDuration] = time;
            }
        },
        _momentum: function(dist, time, maxDistUpper, maxDistLower, size) {
            var deceleration = 6E-4,
                speed = m.abs(dist) / time,
                newDist = speed * speed / (2 * deceleration),
                newTime = 0,
                outsideDist = 0;
            if (dist > 0 && newDist > maxDistUpper) {
                outsideDist = size / (6 / (newDist / speed * deceleration));
                maxDistUpper = maxDistUpper + outsideDist;
                speed = speed * maxDistUpper / newDist;
                newDist = maxDistUpper;
            } else {
                if (dist < 0 && newDist > maxDistLower) {
                    outsideDist = size / (6 / (newDist / speed * deceleration));
                    maxDistLower = maxDistLower + outsideDist;
                    speed = speed * maxDistLower / newDist;
                    newDist = maxDistLower;
                }
            }
            newDist = newDist * (dist < 0 ? -1 : 1);
            newTime = speed / deceleration;
            return {
                dist: newDist,
                time: m.round(newTime)
            };
        },
        _offset: function(el) {
            var left = -el.offsetLeft,
                top = -el.offsetTop;
            while (el = el.offsetParent) {
                left -= el.offsetLeft;
                top -= el.offsetTop;
            }
            if (el != this.wrapper) {
                left *= this.scale;
                top *= this.scale;
            }
            return {
                left: left,
                top: top
            };
        },
        _snap: function(x, y) {
            var that = this,
                i, l, page, time, sizeX, sizeY;
            page = that.pagesX.length - 1;
            for (i = 0, l = that.pagesX.length; i < l; i++) {
                if (x >= that.pagesX[i]) {
                    page = i;
                    break;
                }
            }
            if (page == that.currPageX && page > 0 && that.dirX < 0) {
                page--;
            }
            x = that.pagesX[page];
            sizeX = m.abs(x - that.pagesX[that.currPageX]);
            sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;
            that.currPageX = page;
            page = that.pagesY.length - 1;
            for (i = 0; i < page; i++) {
                if (y >= that.pagesY[i]) {
                    page = i;
                    break;
                }
            }
            if (page == that.currPageY && page > 0 && that.dirY < 0) {
                page--;
            }
            y = that.pagesY[page];
            sizeY = m.abs(y - that.pagesY[that.currPageY]);
            sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;
            that.currPageY = page;
            time = m.round(m.max(sizeX, sizeY)) || 200;
            return {
                x: x,
                y: y,
                time: time
            };
        },
        _bind: function(type, el, bubble) {
            (el || this.scroller).addEventListener(type, this, !!bubble);
        },
        _unbind: function(type, el, bubble) {
            (el || this.scroller).removeEventListener(type, this, !!bubble);
        },
        destroy: function() {
            var that = this;
            that.scroller.style[transform] = "";
            that.hScrollbar = false;
            that.vScrollbar = false;
            that._scrollbar("h");
            that._scrollbar("v");
            that._unbind(RESIZE_EV, window);
            that._unbind(START_EV);
            that._unbind(MOVE_EV, window);
            that._unbind(END_EV, window);
            that._unbind(CANCEL_EV, window);
            if (!that.options.hasTouch) {
                that._unbind("DOMMouseScroll");
                that._unbind("mousewheel");
            }
            if (that.options.useTransition) {
                that._unbind(TRNEND_EV);
            }
            if (that.options.checkDOMChanges) {
                clearInterval(that.checkDOMTime);
            }
            if (that.options.onDestroy) {
                that.options.onDestroy.call(that);
            }
        },
        refresh: function() {
            var that = this,
                offset, i, l, els, pos = 0,
                page = 0;
            if (that.scale < that.options.zoomMin) {
                that.scale = that.options.zoomMin;
            }
            that.wrapperW = that.wrapper.clientWidth || 1;
            that.wrapperH = that.wrapper.clientHeight || 1;
            that.minScrollY = -that.options.topOffset || 0;
            that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);
            that.scrollerH = m.round((that.scroller.offsetHeight + that.minScrollY) * that.scale);
            that.maxScrollX = that.wrapperW - that.scrollerW;
            that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;
            that.dirX = 0;
            that.dirY = 0;
            if (that.options.onRefresh) {
                that.options.onRefresh.call(that);
            }
            that.hScroll = that.options.hScroll && that.maxScrollX < 0;
            that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);
            that.hScrollbar = that.hScroll && that.options.hScrollbar;
            that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;
            offset = that._offset(that.wrapper);
            that.wrapperOffsetLeft = -offset.left;
            that.wrapperOffsetTop = -offset.top;
            if (typeof that.options.snap == "string") {
                that.pagesX = [];
                that.pagesY = [];
                els = that.scroller.querySelectorAll(that.options.snap);
                for (i = 0, l = els.length; i < l; i++) {
                    pos = that._offset(els[i]);
                    pos.left += that.wrapperOffsetLeft;
                    pos.top += that.wrapperOffsetTop;
                    that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;
                    that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;
                }
            } else {
                if (that.options.snap) {
                    that.pagesX = [];
                    while (pos >= that.maxScrollX) {
                        that.pagesX[page] = pos;
                        pos = pos - that.wrapperW;
                        page++;
                    }
                    if (that.maxScrollX % that.wrapperW) {
                        that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length - 1] + that.pagesX[that.pagesX.length - 1];
                    }
                    pos = 0;
                    page = 0;
                    that.pagesY = [];
                    while (pos >= that.maxScrollY) {
                        that.pagesY[page] = pos;
                        pos = pos - that.wrapperH;
                        page++;
                    }
                    if (that.maxScrollY % that.wrapperH) {
                        that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length - 1] + that.pagesY[that.pagesY.length - 1];
                    }
                }
            }
            that._scrollbar("h");
            that._scrollbar("v");
            if (!that.zoomed) {
                that.scroller.style[transitionDuration] = "0";
                that._resetPos(400);
            }
        },
        scrollTo: function(x, y, time, relative) {
            var that = this,
                step = x,
                i, l;
            that.stop();
            if (!step.length) {
                step = [{
                    x: x,
                    y: y,
                    time: time,
                    relative: relative
                }];
            }
            for (i = 0, l = step.length; i < l; i++) {
                if (step[i].relative) {
                    step[i].x = that.x - step[i].x;
                    step[i].y = that.y - step[i].y;
                }
                that.steps.push({
                    x: step[i].x,
                    y: step[i].y,
                    time: step[i].time || 0
                });
            }
            that._startAni();
        },
        scrollToElement: function(el, time) {
            var that = this,
                pos;
            el = el.nodeType ? el : that.scroller.querySelector(el);
            if (!el) {
                return;
            }
            pos = that._offset(el);
            pos.left += that.wrapperOffsetLeft;
            pos.top += that.wrapperOffsetTop;
            pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
            pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
            time = time === undefined ? m.max(m.abs(pos.left) * 2, m.abs(pos.top) * 2) : time;
            that.scrollTo(pos.left, pos.top, time);
        },
        scrollToPage: function(pageX, pageY, time) {
            var that = this,
                x, y;
            time = time === undefined ? 400 : time;
            if (that.options.onScrollStart) {
                that.options.onScrollStart.call(that);
            }
            if (that.options.snap) {
                pageX = pageX == "next" ? that.currPageX + 1 : pageX == "prev" ? that.currPageX - 1 : pageX;
                pageY = pageY == "next" ? that.currPageY + 1 : pageY == "prev" ? that.currPageY - 1 : pageY;
                pageX = pageX < 0 ? 0 : pageX > that.pagesX.length - 1 ? that.pagesX.length - 1 : pageX;
                pageY = pageY < 0 ? 0 : pageY > that.pagesY.length - 1 ? that.pagesY.length - 1 : pageY;
                that.currPageX = pageX;
                that.currPageY = pageY;
                x = that.pagesX[pageX];
                y = that.pagesY[pageY];
            } else {
                x = -that.wrapperW * pageX;
                y = -that.wrapperH * pageY;
                if (x < that.maxScrollX) {
                    x = that.maxScrollX;
                }
                if (y < that.maxScrollY) {
                    y = that.maxScrollY;
                }
            }
            that.scrollTo(x, y, time);
        },
        disable: function() {
            this.stop();
            this._resetPos(0);
            this.enabled = false;
            this._unbind(MOVE_EV, window);
            this._unbind(END_EV, window);
            this._unbind(CANCEL_EV, window);
        },
        enable: function() {
            this.enabled = true;
        },
        stop: function() {
            if (this.options.useTransition) {
                this._unbind(TRNEND_EV);
            } else {
                cancelFrame(this.aniTime);
            }
            this.steps = [];
            this.moved = false;
            this.animating = false;
        },
        zoom: function(x, y, scale, time) {
            var that = this,
                relScale = scale / that.scale;
            if (!that.options.useTransform) {
                return;
            }
            that.zoomed = true;
            time = time === undefined ? 200 : time;
            x = x - that.wrapperOffsetLeft - that.x;
            y = y - that.wrapperOffsetTop - that.y;
            that.x = x - x * relScale + that.x;
            that.y = y - y * relScale + that.y;
            that.scale = scale;
            that.refresh();
            that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;
            that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;
            that.scroller.style[transitionDuration] = time + "ms";
            that.scroller.style[transform] = "translate(" + that.x + "px," + that.y + "px) scale(" + scale + ")" + translateZ;
            that.zoomed = false;
        },
        isReady: function() {
            return !this.moved && !this.zoomed && !this.animating;
        }
    };

    function prefixStyle(style) {
        if (vendor === "") {
            return style;
        }
        style = style.charAt(0).toUpperCase() + style.substr(1);
        return vendor + style;
    }
    dummyStyle = null;
    if (typeof exports !== "undefined") {
        exports.iScroll = iScroll;
    } else {
        window.iScroll = iScroll;
    }
})(window, document);
